boards: nxp: frdm_mcxa156: Support usb for NXP frdm_mcxa156 board

Support usb for NXP frdm_mcxa156 board.
Test it using samples/subsys/usb/console and tests/drivers/udc

Signed-off-by: Neil Chen <cheng.chen_1@nxp.com>

boards/nxp/frdm_mcxa156/board.c

@@ -154,6 +154,11 @@ static int frdm_mcxa156_init(void)
 	CLOCK_AttachClk(kFRO12M_to_LPTMR0);
 #endif /* DT_PROP(DT_NODELABEL(lptmr0), clk_source) */
 
+#endif
+
+#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(usb))
+	RESET_PeripheralReset(kUSB0_RST_SHIFT_RSTn);
+	CLOCK_EnableUsbfsClock();
 #endif
 
 	/* Set SystemCoreClock variable. */

boards/nxp/frdm_mcxa156/doc/index.rst

@@ -64,6 +64,8 @@ The FRDM-MCXA156 board configuration supports the following hardware features:
 +-----------+------------+-------------------------------------+
 | PWM       | on-chip    | pwm                                 |
 +-----------+------------+-------------------------------------+
+| USB       | on-chip    | USB device                          |
++-----------+------------+-------------------------------------+
 
 Targets available
 ==================

boards/nxp/frdm_mcxa156/frdm_mcxa156.dts

@@ -117,3 +117,8 @@
 &lptmr0 {
 	status = "okay";
 };
+
+zephyr_udc0: &usb {
+	status = "okay";
+	num-bidir-endpoints = <8>;
+};

boards/nxp/frdm_mcxa156/frdm_mcxa156.yaml

@@ -21,4 +21,6 @@ supported:
   - counter
   - dac
   - pwm
+  - usb_device
+  - usbd
 vendor: nxp